Alright, let's solve this math problem step by step. First, we have the number 907. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 100. So, we're going to take the number 907 and add it to itself 100 times.
Step 1: 0 + 907 = 907
Step 2: 907 + 907 = 1814
Step 3: 1814 + 907 = 2721
Step 4: 2721 + 907 = 3628
Step 5: 3628 + 907 = 4535
Step 6: 4535 + 907 = 5442
Step 7: 5442 + 907 = 6349
Step 8: 6349 + 907 = 7256
Step 9: 7256 + 907 = 8163
Step 10: 8163 + 907 = 9070
Step 11: 9070 + 907 = 9977
Step 12: 9977 + 907 = 10884
Step 13: 10884 + 907 = 11791
Step 14: 11791 + 907 = 12698
Step 15: 12698 + 907 = 13605
Step 16: 13605 + 907 = 14512
Step 17: 14512 + 907 = 15419
Step 18: 15419 + 907 = 16326
Step 19: 16326 + 907 = 17233
Step 20: 17233 + 907 = 18140
Step 21: 18140 + 907 = 19047
Step 22: 19047 + 907 = 19954
Step 23: 19954 + 907 = 20861
Step 24: 20861 + 907 = 21768
Step 25: 21768 + 907 = 22675
Step 26: 22675 + 907 = 23582
Step 27: 23582 + 907 = 24489
Step 28: 24489 + 907 = 25396
Step 29: 25396 + 907 = 26303
Step 30: 26303 + 907 = 27210
Step 31: 27210 + 907 = 28117
Step 32: 28117 + 907 = 29024
Step 33: 29024 + 907 = 29931
Step 34: 29931 + 907 = 30838
Step 35: 30838 + 907 = 31745
Step 36: 31745 + 907 = 32652
Step 37: 32652 + 907 = 33559
Step 38: 33559 + 907 = 34466
Step 39: 34466 + 907 = 35373
Step 40: 35373 + 907 = 36280
Step 41: 36280 + 907 = 37187
Step 42: 37187 + 907 = 38094
Step 43: 38094 + 907 = 39001
Step 44: 39001 + 907 = 39908
Step 45: 39908 + 907 = 40815
Step 46: 40815 + 907 = 41722
Step 47: 41722 + 907 = 42629
Step 48: 42629 + 907 = 43536
Step 49: 43536 + 907 = 44443
Step 50: 44443 + 907 = 45350
Step 51: 45350 + 907 = 46257
Step 52: 46257 + 907 = 47164
Step 53: 47164 + 907 = 48071
Step 54: 48071 + 907 = 48978
Step 55: 48978 + 907 = 49885
Step 56: 49885 + 907 = 50792
Step 57: 50792 + 907 = 51699
Step 58: 51699 + 907 = 52606
Step 59: 52606 + 907 = 53513
Step 60: 53513 + 907 = 54420
Step 61: 54420 + 907 = 55327
Step 62: 55327 + 907 = 56234
Step 63: 56234 + 907 = 57141
Step 64: 57141 + 907 = 58048
Step 65: 58048 + 907 = 58955
Step 66: 58955 + 907 = 59862
Step 67: 59862 + 907 = 60769
Step 68: 60769 + 907 = 61676
Step 69: 61676 + 907 = 62583
Step 70: 62583 + 907 = 63490
Step 71: 63490 + 907 = 64397
Step 72: 64397 + 907 = 65304
Step 73: 65304 + 907 = 66211
Step 74: 66211 + 907 = 67118
Step 75: 67118 + 907 = 68025
Step 76: 68025 + 907 = 68932
Step 77: 68932 + 907 = 69839
Step 78: 69839 + 907 = 70746
Step 79: 70746 + 907 = 71653
Step 80: 71653 + 907 = 72560
Step 81: 72560 + 907 = 73467
Step 82: 73467 + 907 = 74374
Step 83: 74374 + 907 = 75281
Step 84: 75281 + 907 = 76188
Step 85: 76188 + 907 = 77095
Step 86: 77095 + 907 = 78002
Step 87: 78002 + 907 = 78909
Step 88: 78909 + 907 = 79816
Step 89: 79816 + 907 = 80723
Step 90: 80723 + 907 = 81630
Step 91: 81630 + 907 = 82537
Step 92: 82537 + 907 = 83444
Step 93: 83444 + 907 = 84351
Step 94: 84351 + 907 = 85258
Step 95: 85258 + 907 = 86165
Step 96: 86165 + 907 = 87072
Step 97: 87072 + 907 = 87979
Step 98: 87979 + 907 = 88886
Step 99: 88886 + 907 = 89793
Step 100: 89793 + 907 = 90700

So, 907*100 = 90700